<!DOCTYPE html>
<html lang="en">

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

  <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>首页</title>
  <script src="js/rem.js"></script>
  <style>
    *{
      margin: 0;
      padding: 0;
    }
    .main{
      position: relative;
      max-width: 640px;
      height: 100vh;
      margin: 0 auto;
      background-color: #44dee8;
    }
    .main_btn{
      position: absolute;
      width: 40%;
      margin-left: 30%;
      margin-top: 132%;
      height: 1rem;
    }
    .bgImg{
      position: absolute;
      width: 100%;
    }
  </style>
</head>

<body>
  <div class="main">
    <img class="bgImg" src="image/bg1.jpg" alt="">
    <div class="main_btn" onclick="start()"></div>
  </div>
  <script>
    function start () {
      window.location.href = "index.html"
    }
  </script>
</body>

</html>